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Dr. Patrick R. Duffy Jr., MD
NPI1912905621
- Medicare services, 2022
- 52
- Part D claims, 2024
- 14
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $2,979
- Practice address
- 130 Division St, Derby, CT 06418
- Practice phone
- Call (203) 732-7500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Duffy's professional email, personal email and mobile number
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Dr. Patrick R. Duffy Jr. is an orthopedic surgeon in Derby, Connecticut
Dr. Duffy practices at Griffin Hospital in Derby, Connecticut, part of Griffin Hospital.
Dr. Duffy's NPI, 1912905621, was assigned on July 7, 2005. Dr. Duffy graduated from Georgetown University School of Medicine in 1981. Dr. Duffy holds Connecticut license 027466.
NPI and contact details
- NPI
- 1912905621NPI Registry (opens in a new tab)
- NPI enumeration date
- July 7, 2005
- NPI status
- Active
- Practice phone
- (203) 732-7500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Patrick R. Duffy Jr. practices at 2 locations in Derby, Connecticut
Dr. Duffy's primary practice is Griffin Hospital, at 130 Division St, Derby, CT 06418 in New Haven County. The practice phone is (203) 732-7500. Dr. Duffy also practices at Griffin Hospital, 144 Division St, Derby, CT 06418.
- Griffin HospitalPrimary130 Division St, Derby, CT 06418 · New Haven CountyPhone(203) 732-7500
- Griffin Hospital144 Division St, Derby, CT 06418 · Naugatuck Vly CountyPhone(203) 732-7360
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Patrick R. Duffy Jr. is affiliated with 2 sites of care
Dr. Duffy's primary practice is Griffin Hospital in Derby, Connecticut, part of Griffin Hospital. Dmand AI also links Dr. Duffy to 1 physician office, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Patrick R. Duffy Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duffy practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Griffin Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Patrick R. Duffy Jr. is one of 300 orthopedic surgeons in Connecticut
Orthopaedic surgery is Dr. Duffy's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Duffy is licensed in Connecticut.
Specialties and state licenses
- Orthopaedic surgery, ConnecticutPrimary
Orthopedic surgeons near Dr. Duffy
Counts of orthopedic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
300orthopedic surgeons in Connecticut
5orthopedic surgeons in Derby
4orthopedic surgeons at Griffin HospitalSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Patrick R. Duffy Jr. billed Medicare for 52 services in 2022
CMS data shows 52 Medicare services from Dr. Duffy across 2 procedure codes in 2022, all of them office visits. Medicare paid $5,873 for them. Every service was in an office.
Medicare services, 202252
Paid by Medicare$5,873
Procedure codes2
Dr. Duffy's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 882022: 5241%
- Drugs given in the office
- 2021: 142022: 0100%
Dr. Duffy compared with the Connecticut median for orthopedic surgeons, 2022
- Dr. Duffy
- Connecticut median
- Medicare services
- 52vs 86494% below
- Part D claims
- 43vs 12265% below
Medians across 297 orthopedic surgeons in Connecticut with Dmand AI profiles that report each measure.
Dr. Duffy's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Duffy?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Duffy and other orthopedic surgeons in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Patrick R. Duffy Jr.'s patients have a median age of 64
Across all payers, Dmand AI patient panel data puts Dr. Duffy's median patient age at 64, with 52% women.
Dr. Duffy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women52%
- Men48%
Source: Dmand AI Patient Panel Data
Dr. Patrick R. Duffy Jr. wrote 14 Medicare Part D claims in 2024
In 2024, Dr. Duffy wrote 14 Medicare Part D claims. 100% of them were for generic drugs. They cover 1 drug, with $249 in total drug cost. In 2017, CMS named 25 claims across 2 drugs.
Part D claims, 202414
Drugs named by CMS1
Total drug cost$249
Dr. Duffy's most prescribed drugs by claims, 2018
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 252018: 4372%
Drugs named by CMS: 1 in 2018, 2 in 2017.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Patrick R. Duffy Jr. has 1 publication on record
Dmand AI links 1 paper to Dr. Duffy in 2015.
Papers1
Recent publications by Dr. Duffy
See who Dr. Duffy researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Duffy works with, so you can find a warm path to the right orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Patrick R. Duffy Jr. received $2,979 in industry payments from 2016 to 2022
CMS Open Payments shows 20 general payments to Dr. Duffy from 11 drug and device companies from 2016 to 2022. Travel and lodging make up the largest share, 39% of the total. Smith & Nephew, Inc. paid the most, $1,356.
General payments to Dr. Duffy by program year, 2016 to 2022
General payments to Dr. Duffy by kind, 2016 to 2022
$3Kin total
- Travel and lodging$1,15939%
- Education$1,03535%
- Food and beverage$78526%
Companies that paid Dr. Duffy the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Patrick R. Duffy Jr. graduated from Georgetown University School of Medicine
Dr. Duffy graduated from Georgetown University School of Medicine in 1981.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Patrick R. Duffy Jr.'s profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Patrick R. Duffy Jr.
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Patrick R. Duffy Jr.'s NPI number?
Dr. Patrick R. Duffy Jr.'s NPI number is 1912905621. It was assigned on July 7, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Patrick R. Duffy Jr.?
Dr. Patrick R. Duffy Jr. is an orthopedic surgeon in Derby, Connecticut. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Patrick R. Duffy Jr. practice?
Dr. Duffy practices at 130 Division St, Derby, CT 06418. Dr. Duffy also practices at 144 Division St, Derby, CT 06418. Dr. Duffy's primary practice is Griffin Hospital in Derby, Connecticut, part of Griffin Hospital. Dmand AI also links Dr. Duffy to 1 physician office.
What is Dr. Patrick R. Duffy Jr.'s office phone number?
The practice phone on file for Dr. Duffy is (203) 732-7500.
What is Dr. Patrick R. Duffy Jr.'s medical license number?
Dr. Duffy holds Connecticut license 027466.
Which hospitals is Dr. Patrick R. Duffy Jr. affiliated with?
Dr. Duffy practices at Griffin Hospital in Derby, Connecticut.
Does Dr. Patrick R. Duffy Jr. accept Medicare?
Yes. CMS data shows Dr. Duffy billed Medicare for 52 services in 2022.
What services does Dr. Patrick R. Duffy Jr. bill to Medicare?
In 2022, Dr. Duffy's most billed Medicare services were office visit, established patient (99214) and office visit, new patient (99204).
Where did Dr. Patrick R. Duffy Jr. go to medical school?
Dr. Duffy graduated from Georgetown University School of Medicine in 1981.
What drugs does Dr. Patrick R. Duffy Jr. prescribe most?
In 2018 Medicare Part D data, Dr. Duffy's most prescribed drugs by claims were Hydrocodone-Acetaminophen.
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Has Dr. Patrick R. Duffy Jr. received payments from drug or device companies?
CMS Open Payments shows $2,979 in general payments to Dr. Duffy from 11 companies from 2016 to 2022. The largest total came from Smith & Nephew, Inc.
How long has Dr. Patrick R. Duffy Jr. been practicing?
Dr. Duffy graduated from medical school in 1981, 45 years ago.
Does Dr. Patrick R. Duffy Jr. do research?
Dmand AI links 1 publication to Dr. Duffy.
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